System of electrical distribution



G. B. SCHEIBELL SYSTEM l`0F ELECTRICAL DISTRIBUT'ION- Film1 oct. 21,195o 1 March 14, 1933.

ATTORNFY Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE GORDON BROWNSCHEIBELL, OF NEWARK, NEW JERSEY, ASSIGNOR TO WIRED RADIO, INC., OF NEWYORK, N. Y., A CORPORATION 0F DELAWARE SYSTEM OF ELECTRICAL DISTRIBUTIONApplication filed October 21, 1930. Serial No. 490,181.

By invention pertains in general to systems of electrical distributionand specifically relates to means for reducing the attenuation of highfrequency current impressed on light and power current distributionnetworks.

In the system of wired radio broadcasting in which carrier frequencycurrents are utilized to distribute programs over commercial light andpower lines to a multiplicity of consumers, it has been found thatcertain types of commercial current consuming devices, such asflatirons, heaters, and incandescent lamps of excessive wattage arenonreactive at carrier frequencies and absorb carrier frequency currentto an appreciable extent. Such absorption of carrier frequency currentobviously reduces the operating efficiency of a wired radio broadcastingsystem.

One of the objects of my invention consists in producing a system ofelectrical distribution in which high frequency signals are delivered toa consumers dwelling over light and power lines and in which means areprovided at the consumers dwelling to distribute the high frequencysignals over independent wire lines.

Another object of my invention consists in producing a consumers localelectrical distribution system in which auxiliary lines are provided forthe express distribution of high frequency currents and in which allnon-reactive commercial current consuming devices are electricallyisolated from carrier frequency currents.

A further object of my invention comprises producing a consumers localelectrical distribution system in which high frequency currents andcommercial light and power currents are directed from a common sourceover independent wire lines to a plu- `rality of service outlet sockets.

In the drawing which accompanies and forms a part of this specificationI have schematically represented one embodiment of the system ofelectrical distribution of my invention.

According to my invention, carrier frequency currents are impressed upona commercial light and power distributing network for the distributionof programs to consumers. At the consumers dwelling, means are providedto render the entire local distribution system opaque to high frequencycuri rents, thereby avoiding the absorption of high frequency currentsby non-reactive current consuming devices ordinarily found in theconsumers dwelling. Independent wire lines are coupled to the consumersinput supci ply in a manner such as to receive only high 'frequencycurrents. The independent wire lines serve as a source of high frequencysignais for wired radio receiving apparatus in the consumers dwelling,and are adapted to inexpensive construction, inasmuch as appreciablepower is not transmitted thereby. Referring to the drawing in detail, asource of commercial light and power current 1 is provided within thecentral station 70 2 which feeds commercial light and power currents athigh voltages into the primary distributing lines 3. A source of carrierfrequency current 4 is also provided within the central station 2 and isconnected to the 75 lines 3 through capacitive couplings 5. A step-downtransformer 6 is connected to the primary lines 3 and provides consumersvoltages of the order of 110-220 volts for the secondary lines 7extending from the sec- 80 ondary winding of the transformer 6. Such anarrangement of primary lines 3, transformer 6, and secondary lines 7, isindicative lof a normal commercial light and power distributing network.The secondary lines 7 are connected to a service switch 8 located withina consumers dwelling 9. A watt-hour meter 10 is connected in series tothe service switch 8 for the purpose of integrating the consumers powerconsumption. A fuse panel 11 is connected in series with the watt-hourmeter 10. The

switch 8, watt-hour meter 10, and fuse panel 11, comprise normal serviceequipment found in a typical consumers dwelling. The delivery circuit 12extends from the fuse panel 11 and is connected to branch circuits 13and 14. The delivery lines 12 and branch lines 13 and 14 comprise adistribution circuit normally found in a consumers dwelling.

According to my invention, I interpose a signal blocker 15 in thecircuit 12 immediately following the fuse panel l1. This signal blocker15 comprises a series connected high frequency choke coil 1G and acapacitance 17 connected in shunt. The purpose of the signal blocker 15is to prevent passage of high frequency currents therethrough. The chokecoil 16 greatly restricts the passage of high frequency currents, whilethe capacitance 17 by-passes any high frequency currents that passthrough the choke coil.

In accordance with my invention, auxiliary wire lines 18 are coupled,through capacitive couplings 19, to the output lines extending fromwatt-hour meter 10. These lines 18 receive only high frequency current,inasmuch as t-he commercial low frequency, or direct, current cannotpass through the capacitive couplings 19. Consequently, the lines 18 maybe of inexpensive construction, inasmuch as no appreciable power istransmitted thereby.

Two service outlets 20 and 21 having double sockets 22 and 23 areprovided, as shown. The sockets 22 are connected to the wire lines 18,while the sockets 23 are connected to the branch lines 13. A wired radioreceiving set 24, employing vacuum tubes as detector and amplifiers, hasa signal input connection to the socket 22 of the service outlet 20. Theoutput from the wired radio receiving set 24 is directed to a loudspeaker 29. Power supply for operation of the vacuum tubes is obtainedfrom socket 23 of the service outlet 20. A crystal set 25 is shown asbeing connected to the socket 22 of service outlet 21. An electricfiatiron 26 is connected to the socket 23 of service outlet 21. Thereceiving set 24 could be situated in any part of the consumers dwellingwhere several auditors are likely to be gathered, while the receiver 25could be located in another part of the consumers dwelling for thebenefit of one or two auditors. Such an arrangement is merelyrepresentative of a typical installation according to my system.

A resistance 27 is shown connected to the lines 14 and is indicative ofheavy non-reactive loads such as electric ranges and heaters to be foundin a typical consumers distribution system. The incandescent lamps 28are connected to both the branch lines 13 and 14. Such lamps, especiallywhen of excessive wattage, produce appreciable absorption of highfrequency currents. It will be obvious that all of the commercialcurrent consuming devices connected to the consumers local distributioncircuit are isolated from high frequency currents by means of the signalblocker 15. Absorption of high frequency currents by the nonreactivecurrent consuming devices is thereby avoided. This makes for moreelicient distribution of carrier frequenc programs over the light andpower networ inasmuch as a lower signal level can be maintained to reacha given number of consumers, and at the saine time, the quality of thecarrier frequency program is undisturbed by the nonreactive currentconsuming devices.

Although I have shown a preferred embodiment of my system of electricaldistribution, it is, of course, to be understood that changes thereinwill readily occur to those skilled in the art but which will not departfrom the intended scope of my invention. I do not, therefore, desire tolimit myself to the foregoing except insofar as may be pointed out inthe appended claims.

What I claim as new and original and desire to secure by Letters Patentof the United States is 1. In a wired radio broadcasting system in whichboth commercial power and signalling energy are transmitted over powerlines to consumers local distribution lines connected with commercialpower consuming devices, means for supplying signalling energy from saidpower lines comprising, auxiliary wire lines designed for the exclusivetransmission of signalling energy, said wire lines being coupled to saidpower lines in a manner such as to prevent the passage of commercialpower thereover and means for preventing the passage of signallingenergy over said consumers local power distribution lines, saidauxiliary wire lines being disposed with respect to said consumers localpower lines for conjoint use therewith in the operation of a radioreceiving system requiringboth commercial power and signalling energy.

2. The system in accordance with claim 1 including a service outlethaving two se aiate service plugs therein, said plugs being respectivelyconnected with said auxiliary vire lines and said consumers local powerines.

GORDON BROWN SCHEIBELL.

